158 lines
4.2 KiB
Go
158 lines
4.2 KiB
Go
package client
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import (
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v1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/version"
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"k8s.io/client-go/discovery/cached/disk"
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"k8s.io/client-go/dynamic"
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"k8s.io/client-go/kubernetes"
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restclient "k8s.io/client-go/rest"
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mv1beta1 "k8s.io/metrics/pkg/apis/metrics/v1beta1"
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versioned "k8s.io/metrics/pkg/client/clientset/versioned"
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)
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const (
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// NA Not available.
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NA = "n/a"
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// NamespaceAll designates the fictional all namespace.
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NamespaceAll = "all"
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// AllNamespaces designates all namespaces.
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AllNamespaces = ""
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// ClusterScope designates a resource is not namespaced.
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ClusterScope = "-"
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// NotNamespaced designates a non resource namespace.
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NotNamespaced = "*"
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// CreateVerb represents create access on a resource.
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CreateVerb = "create"
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// UpdateVerb represents an update access on a resource.
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UpdateVerb = "update"
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// PatchVerb represents a patch access on a resource.
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PatchVerb = "patch"
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// DeleteVerb represents a delete access on a resource.
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DeleteVerb = "delete"
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// GetVerb represents a get access on a resource.
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GetVerb = "get"
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// ListVerb represents a list access on a resource.
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ListVerb = "list"
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// WatchVerb represents a watch access on a resource.
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WatchVerb = "watch"
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)
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var (
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// GetAccess reads a resource.
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GetAccess = []string{GetVerb}
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// ListAccess list resources.
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ListAccess = []string{ListVerb}
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// MonitorAccess monitors a collection of resources.
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MonitorAccess = []string{ListVerb, WatchVerb}
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// ReadAllAccess represents an all read access to a resource.
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ReadAllAccess = []string{GetVerb, ListVerb, WatchVerb}
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)
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// ContainersMetrics tracks containers metrics.
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type ContainersMetrics map[string]*mv1beta1.ContainerMetrics
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// NodesMetricsMap tracks node metrics.
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type NodesMetricsMap map[string]*mv1beta1.NodeMetrics
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// PodsMetricsMap tracks pod metrics.
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type PodsMetricsMap map[string]*mv1beta1.PodMetrics
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// Authorizer checks what a user can or cannot do to a resource.
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type Authorizer interface {
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// CanI returns true if the user can use these actions for a given resource.
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CanI(ns, gvr string, verbs []string) (bool, error)
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}
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// Connection represents a Kubernetes apiserver connection.
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type Connection interface {
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Authorizer
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// Config returns current config.
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Config() *Config
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// ConnectionOK checks api server connection status.
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ConnectionOK() bool
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// Dial connects to api server.
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Dial() (kubernetes.Interface, error)
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// DialLogs connects to api server for logs.
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DialLogs() (kubernetes.Interface, error)
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// SwitchContext switches cluster based on context.
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SwitchContext(ctx string) error
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// CachedDiscovery connects to discovery client.
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CachedDiscovery() (*disk.CachedDiscoveryClient, error)
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// RestConfig connects to rest client.
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RestConfig() (*restclient.Config, error)
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// MXDial connects to metrics server.
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MXDial() (*versioned.Clientset, error)
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// DynDial connects to dynamic client.
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DynDial() (dynamic.Interface, error)
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// HasMetrics checks if metrics server is available.
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HasMetrics() bool
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// ValidNamespaces returns all available namespaces.
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ValidNamespaces() ([]v1.Namespace, error)
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// ServerVersion returns current server version.
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ServerVersion() (*version.Info, error)
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// CheckConnectivity checks if api server connection is happy or not.
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CheckConnectivity() bool
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// ActiveCluster returns the current cluster name.
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ActiveCluster() string
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// ActiveNamespace returns the current namespace.
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ActiveNamespace() string
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// IsActiveNamespace checks if given ns is active.
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IsActiveNamespace(string) bool
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}
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// CurrentMetrics tracks current cpu/mem.
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type CurrentMetrics struct {
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CurrentCPU, CurrentMEM, CurrentEphemeral int64
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}
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// PodMetrics represent an aggregation of all pod containers metrics.
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type PodMetrics CurrentMetrics
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// NodeMetrics describes raw node metrics.
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type NodeMetrics struct {
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CurrentMetrics
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AllocatableCPU, AllocatableMEM, AllocatableEphemeral int64
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AvailableCPU, AvailableMEM, AvailableEphemeral int64
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TotalCPU, TotalMEM, TotalEphemeral int64
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}
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// ClusterMetrics summarizes total node metrics as percentages.
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type ClusterMetrics struct {
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PercCPU, PercMEM, PercEphemeral int
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}
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// NodesMetrics tracks usage metrics per nodes.
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type NodesMetrics map[string]NodeMetrics
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// PodsMetrics tracks usage metrics per pods.
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type PodsMetrics map[string]PodMetrics
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